Peugeot 807 Mixture Preparation Error

I've got a 2003 Peugeot 807 (gasoline engine) with only 42480 km. I'm running into a mixture preparation error. The check engine light is on, and the engine is running rough. I'm getting reduced engine power and jerking when accelerating, and sometimes it even stalls at idle. I've checked the spark plugs, and they look okay. I'm wondering if anyone has experienced something similar? Could it be the oxygen sensor or maybe the throttle body?

4 comment(s)

Hey there! I had a similar issue with my 807 a while back. Those symptoms sound really familiar. Did you happen to notice if the exhaust smelled particularly rich, almost like fuel? I'm wondering if it's the same problem I had.

You know, I think I did notice a slightly richer smell than usual. What was the problem with yours? Was it hard to diagnose?

Yeah, the rich fuel smell was the giveaway for me. Turned out to be a faulty injector causing the mixture to be way off. Honestly, I'd suggest getting it checked at a workshop. It's tricky to diagnose without the right equipment.

Thanks a lot for the insight! I took your advice and brought it to a local shop. They confirmed it was a defective injector. Repair cost me 515€, but the car is running perfectly now.

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